Update README.md

Author: absognety

CloudCover/README.md

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-# First round:  
+# Personal Experience for Data Engineer - 2021:  
+## First round:  
 Live Programming round - Given 1.5 hrs of time, you need to solve a problem statement live on web based IDE.  
+  
+## Second round:  
+Techical Discussion on the projects done, Some interview questions on Spark,Hive,Hadoop:  
+   - About windows functions in spark, what they are used for in spark?
+   - About UDFs in spark and how they are different from normal spark functions in performance.  
+   - Difference between external table and managed table in hive.  
+   - experience on moving large scale data between different sinks? cloud migrations? database migrations?  
+   - experience writing complex sql queries?  
+   - behaviorial questions.  
+   - current project and what are the responsibilities of your role specifically in your company.  
+   - some other questions on bigdata, which I don't remember right now 😁